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Parametric Functional Maps of Visual Inputs to the Tectum

Research output: Contribution to journalArticlepeer-review

Original languageEnglish
Pages (from-to)317-324
Number of pages8
Issue number2
Published18 Oct 2012


  • Nikolaou et al 2012

    Nikolaou_et_al_2012.pdf, 1.18 MB, application/pdf

    Uploaded date:01 May 2014

    Version:Final published version

King's Authors


How features of the visual scene are encoded in the population activity of retinal ganglion cells (RGCs) targeting specific regions of the brain is not well understood. To address this, we have used a genetically encoded reporter of presynaptic function (SyGCaMP3) to record visually evoked activity in the population of RGC axons innervating the zebrafish tectum. Using unbiased voxel-wise analysis of SyGCaMP3 signals, we identify three subtypes of direction-selective and two subtypes of orientation-selective retinal input. Composite parametric functional maps generated across many larvae show laminar segregation of direction- and orientation-selective responses and unexpected retinotopic biases in the distribution of functional subtypes. These findings provide a systematic description of the form, organization, and dimensionality of visual inputs to the brain and will serve as a platform for understanding emergent properties in tectal circuits associated with visually driven behavior.

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